Bankruptcy Law Questions? Ask a Bankruptcy Lawyer.
Income taxes can be discharged only for years that taxes are actually filed. Additionally, once the tax returns are filed, the filer has to wait 2 years before filing.
I think this is what you wanted to know. If not, please let me know.
As filing a Bankruptcy will not get rid of tax debt for any years that you have not filed a tax return, I don't see that filing a Bankruptcy will help you.